Plumbing fixture



FIG. 1 is an isometric view of a front, top, and left side of a plumbing fixture according to our new design;

FIG. 2 is a front elevational view thereof, the rear elevational view being a mirror image thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The broken lines in the drawings depict environment subject matter only and form no part of the claimed design. 

The ornamental design for a plumbing fixture, as shown and described. 